In a Thai stock loan the pledged shares stay in your own custodian account, held in book-entry form at the Thailand Securities Depository (TSD); the lender's security is perfected by recording its control over that account rather than by transferring the shares into its name, and it is released on repayment. You remain the account holder and beneficial owner throughout the term.
Most questions about a Thai stock loan eventually arrive at the same worry: if I pledge my shares, do I lose control of them? It is the right thing to ask, and the answer turns on two mechanics that are easy to conflate but quite distinct — custody (where the shares are held) and perfection (how the lender's security is made legally effective). In a well-structured Thai stock loan, the pledged shares never leave your own account; they sit in book-entry form at the Thailand Securities Depository (TSD), and the lender's security comes from its rights and control over that account rather than from transferring the shares into its name. This note explains how the TSD holds and controls pledged shares, how the security is perfected under Thai law, and what that means for you as the holder — from funding through to release.
Key takeaways
- The TSD is Thailand's central depository; SET- and mai-listed shares are held in book-entry form, not paper certificates.
- The pledged shares stay in your own account at a designated custodian — they are not transferred to the lender.
- The lender's security arises from its rights and control over that account, which is how the pledge is perfected.
- You remain the account holder and beneficial owner throughout, with dividends and corporate actions documented up front.
- On repayment, the security is released and the account reverts fully to your unencumbered control — nothing to unwind.
What the TSD is, and why book-entry matters
The Thailand Securities Depository (TSD) is the central securities depository for the Thai market, operating within the Stock Exchange of Thailand group. It holds shares listed on the SET and the Market for Alternative Investment (mai) in book-entry form — meaning ownership is recorded electronically in a central system rather than represented by physical share certificates that change hands. Nearly all listed Thai equity is held this way, and it is the reason a modern stock loan can be structured without anyone posting paper.
Book-entry custody is what makes the whole arrangement clean. Because ownership and any security interest are recorded as entries in a system rather than through the delivery of certificates, a lender can take effective security over a position without the shares being physically moved or re-registered into its own name. The holder's ownership is recorded; the lender's control is recorded alongside it. That single fact — recorded control instead of physical transfer — is the foundation of everything that follows.
Custody: where the shares actually sit
In the structures we arrange, the pledged shares are deposited into the borrower's own account at a designated custodian and held in book-entry form at the TSD. The word "own" is doing real work there. You are the account holder. You are the beneficial owner. The shares are not swept into an omnibus account in the lender's name, and they are not sold and re-purchased. They stay where they are, in an account that is yours, with the lender's security recorded over it. A custodian — a licensed institution — administers the account and holds the position within the TSD system.
This is the practical answer to the worry we opened with. Custody does not mean handing your shares to the lender; it means placing them in a controlled account whose terms are documented, so that the collateral cannot be moved or sold out from under the loan while you continue to own it. The arrangement is matched to the structure and the recourse profile agreed for the facility.
Perfection: how the lender's security is made effective
Taking security is one thing; making it legally effective against the world — perfecting it — is another. A pledge that is agreed but not perfected can be worth far less than the parties intended if it is ever tested. This is why perfection is not a formality we treat lightly.
A pledge of Thai listed shares held in book-entry form is generally perfected not by delivering certificates — there are none to deliver — but by recording or noting the security over the shares in the depository and custody system and giving the pledgee control over the relevant account. The security "attaches" to the shares in the account and is made effective through that recorded control. In broad terms, the lender's protection rests on being able to demonstrate, through the account records, that it holds a controlling interest over an identifiable pool of collateral that the borrower cannot unilaterally remove.
The precise mechanics — which documents are signed, what is recorded, and in what sequence — are settled for each transaction and are ultimately a matter of Thai law applied to the specific facts. That is a question for your own Thai counsel, engaged in parallel during documentation, and not something we advise on: we act as arranger and introducer. What we can say is that perfection is central to how the transaction is built, not an afterthought bolted on at the end.
Custody answers "where are the shares"; perfection answers "is the lender's security actually good". A sound Thai stock loan gets both right — the shares stay in your account, and the lender's control over that account is properly recorded and effective.
The three documents that hold it together
The arrangement is expressed through three linked documents, each with a distinct job. Reading them as a set is the clearest way to see how custody and perfection interlock.
| Document | What it governs |
|---|---|
| Loan agreement | The advance, interest, tenor, repayment, margin mechanics, and events of default. |
| Share pledge agreement | The security itself — the shares pledged, how the pledge is perfected, and the enforcement route. |
| Custody arrangement | How and where the shares are held in book-entry form at the TSD, and the lender's control over the account. |
The loan agreement sets the commercial terms; the share pledge agreement creates and perfects the security; the custody arrangement gives the security something concrete to attach to and hold. Thai counsel of your choosing reviews all three, which is the point at which the perfection mechanics are confirmed against current law.
Who controls the shares during the loan
While the loan is outstanding, control is shared and documented rather than surrendered — you keep beneficial ownership while the lender holds a controlling security interest over the account. The table below sets out who holds what.
| You (borrower) | The lender | |
|---|---|---|
| Ownership & account holder | Beneficial owner and account holder throughout the term. | Holds a controlling security interest over the account, not ownership. |
| Dividends & corporate actions | How dividends are handled, and how corporate actions such as rights issues are treated, are set out up front so there are no surprises during the term. | Treatment is fixed by the same documented terms. |
| Remove, sell, or substitute the shares | No — you cannot do so unilaterally outside the terms of the pledge. | This is exactly the control the lender's security is designed to secure: the collateral cannot be moved or sold out from under the loan. |
| Margin top-up | May be required to post a top-up if the collateral value falls far enough. | May call for a top-up through the margin mechanism. |
If the collateral value falls far enough, a margin mechanism may call for a top-up, which is why a conservative starting loan-to-value matters.
Release: what happens on repayment
Because the shares never left your account, unwinding the loan is simple. On full repayment, the security is released and the notation over the shares in the depository and custody system is removed. The lender's control lifts, and the account reverts entirely to your unencumbered control, with the position intact and exactly as it was. There is no re-purchase to execute and no re-registration to reverse — the whole point of the book-entry, control-based structure is that release is a clean event, not a transaction.
How this fits the wider transaction
Custody and perfection are the fourth stage of our process — pledge and custody, perfected through the TSD — sitting between documentation and funding. It is where the abstract security becomes a real, recorded interest over your shares. Everything upstream, from the eligibility of the ticker to the indicative LTV, feeds into how the collateral is held; everything downstream, including any foreign-limit or NVDR considerations, is reflected in how the account is structured. The glossary defines the terms used here, and the regulatory framework is administered by the Securities and Exchange Commission of Thailand under the Securities and Exchange Act B.E. 2535.
Frequently asked questions
01What is the TSD and what does it do in a stock loan?
02Do I have to transfer my shares to the lender?
03How is a share pledge perfected in Thailand?
04Who controls the shares while the loan is outstanding?
05What happens to the pledge if I repay the loan?
06Does putting shares into TSD custody trigger disclosure to the SEC?
This article is a general description of how Thai listed shares are held in custody and how a pledge is perfected. It is not legal, tax, or investment advice, and the mechanics of custody and perfection depend on Thai law and the specific facts of each transaction. Confirm your own position with qualified Thai counsel before acting. To discuss a specific holding in confidence, please contact us.